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Kuiper, Gerard Peter

(Encyclopedia)Kuiper, Gerard Peter or Gerrit Pieter gĕrˈĭt pēˈtər kīˈpər [key], 1905–73, American astronomer, b. the Netherlands. Kuiper is considered to be the father of modern planetary science for his...

Crédit Mobilier of America

(Encyclopedia)Crédit Mobilier of America krĕˈdĭt mōbĭlyāˈ, krādēˈ [key], ephemeral construction company, connected with the building of the Union Pacific RR and involved in one of the major financial sca...

Clausewitz, Karl von

(Encyclopedia)Clausewitz, Karl von kärl fən klouˈzəvĭts [key], 1780–1831, Prussian general and military strategist. Clausewitz was an original thinker most influenced by the Napoleonic wars in which he fough...

ephemeris

(Encyclopedia)ephemeris ĭfĕmˈərĭs [key] (pl., ephemerides), table listing the position of one or more celestial bodies for each day of the year. The French publication Connaissance de Temps is the oldest of th...

Fredericksburg

(Encyclopedia)Fredericksburg. 1 Town (2020 pop. 10,875), Gillespie co., S central Texas, in the Texas Hill Country near the Pedernales River; inc. 1928. Located in an...

Hume, David

(Encyclopedia)Hume, David hyo͞om [key], 1711–76, Scottish philosopher and historian. Educated at Edinburgh, he lived (1734–37) in France, where he finished his first philosophical work, A Treatise of Human Nat...

Jarrett, Keith

(Encyclopedia) Jarrett, Keith , 1945- , American jazz pianist and composer, b. Allentown, Pa. A child prodigy on the piano, Jarrett was exposed to contemporary jazz d...

synodic period

(Encyclopedia)synodic period sĭnŏdˈĭk [key], in astronomy, length of time during which a body in the solar system makes one orbit of the sun relative to the earth, i.e., returns to the same elongation. Because ...

probability

(Encyclopedia)probability, in mathematics, assignment of a number as a measure of the “chance” that a given event will occur. There are certain important restrictions on such a probability measure. In any exper...

aurora borealis

(Encyclopedia)aurora borealis ôstrāˈlĭs [key], luminous display of various forms and colors seen in the night sky. The aurora borealis of the Northern Hemisphere is often called the northern lights, and the aur...